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New Feature: Postmark Inbound Auto-Retries

Since launching Postmark Inbound, one of the features that our customers requested the most is the ability to retry inbound posts. Lot of things can happen that can disrupt an inbound JSON post coming from Postmark to the inbound hook server. The web application receiving emails or the web server hosting it can go down due to various reasons. Or, networking issues can render your inbound hook unreachable from Postmark.

Whatever the reason for the failed POST, you shouldn’t ever miss an email. That’s why we are adding automatic retries to Inbound, to ensure your web app receives the processed inbound emails.

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Lessons learned from our recent outages

I owe an explanation for the recent issues on Postmark. This week we had some pretty terrible performance on our MongoDB cluster, resulting in delayed emails, disabled activity and even disabled bounce API. No emails were lost during the outages, but I do want to explain what happened, what we did, and what we are doing about it.

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A really rough Saturday

Today we were going to have a really important, but low impact maintenance. This morning at 9am the team brought the application offline to migrate to a new, more powerful database. Email sending was not going to be affected during most of the process, we expected about 2-4 minutes of paused sending. Things did not happen as we expected and we had some long outages and delays in sending. I want to explain what happened in detail.

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